3825 Ohio Avenue, St. Charles, Illinois 60174
800/736-7672, FAX: 630/377-6495
www.systemsensor.com
MHR and MHW Mini-Horns
SPECIFICATIONS
General Specifications
Standard Operating Temperature:
Humidity Range:
Nominal Voltage:
Operating Voltage Range:
Operating Voltage with MDL3:
Sounder Frequency:
Mechanical Specifications
Input terminal wire gauge:
Horn dimensions:
32°F to 120°F (0°C to 49°C)
10 to 93% non-condensing
Regulated 12DC/FWR or regulated 24DC/FWR
8-33
8.5-33
3kHz (nominal)
12 to 18 AWG
4.6˝L×2.9˝W×.45˝D (117 mm L×74 mm W×11.5 mm D)
GENERAL DESCRIPTION
The SpectrAlert Advance MH Series mini-horns are available in red or white.
They feature 12 or 24 volt operation, high and low volume settings, and temporal or continuous tones. These small footprint horns can be mounted to
single gang back boxes for aesthetically sensitive applications. If required, the
MDL3 module can be used to provide synchronization.
WIRING
FIGURE 1. NON-SYNCHRONIZED DEVICES; ANY COMBINATION OF
MODELS POWERED BY A 2-WIRE CIRCUIT
Horn
(+)
(+)
Horn/strobe
(+)
Strobe Only
(+)
NOTICE: This manual shall be left with the owner/user of this equipment.
(–)
FIRE ALARM SYSTEM CONSIDERATIONS
The National Fire Alarm Code, NFPA 72, requires that all horns, used for
building evacuation installed after July 1, 1996, produce temporal coded signals. Signals other than those used for evacuation purposes do not have to
produce the temporal coded signal.
(–)
(–)
(–)
Two Wire System
E Any Mix of Models
O Wired for Tandem
L
Operation
FIGURE 2. SYNCHRONIZED DEVICES; ANY COMBINATION OF MODELS
POWERED BY A 2-WIRE CIRCUIT
POWER SUPPLY CONSIDERATIONS
Panels typically supply DC filtered voltage or FWR (full wave rectified) voltage. The system design engineer must calculate the number of units used on
a loop based on the type of panel supply. Be certain the sum of all the device
currents does not exceed the current capability of the panel. Calculations are
based on using the device current found in the subsequent charts and must
be compatible with the current specified for the panel or power supply used.
Horn/strobe
(+)
Strobe Only
(+)
MDL3
Horn
(+)
(+)
(–)
(–)
(–)
(–)
Two Wire System
E Any Mix of Models
O Wired for Tandem
L
Operation
Synchronization Module
A0111-01
Loop Design and Wiring
NOTE: For further information on synchronization see MDL3, panel, or power
supply installation manual.
NOTE: For 24 volt applications, the total number of horns on a single NAC
must not exceed 85 with a maximum loop resistance of 120 ohms. For 12 volt
applications, the total number of horns must not exceed 85 with a maximum
loop resistance of 120 ohms.
The system designer must make sure that the total current drawn by the devices on the loop does not exceed the current capability of the panel supply,
and that the last device on the circuit is operated within its rated voltage.
The current draw information for making these calculations can be found in
the tables within this manual. For convenience and accuracy, use the voltage drop calculator on the System Sensor website (www.systemsensor.com)
or CD-ROM. When calculating the voltage available to the last device, it is
necessary to consider the voltage drop due to the resistance of the wire. The
thicker the wire, the smaller the voltage drop. Wire resistance tables can be
obtained from electrical handbooks. Note that if Class A wiring is installed,
the wire length may be up to twice as long as it would be for circuits that are
not fault tolerant.
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INSTALLATION AND MAINTENANCE INSTRUCTIONS
SOUNDER SELECTION
Sounder setting selection is accomplished by using the rotary switch on the
back (see Figure 3). The sound measurements for the various settings are
shown in Table 1A. The current draw for the various settings is shown in
Table 1B.
MOUNTING
1.The MH Mini-Horn is intended for mounting to a standard 2½˝ deep
which allows sufficient clearance for conduit entrance.
2.The MH Mini-Horn is compatible with DC line supervision. The horn is
polarized and has terminals marked with polarity. Apply positive supply
voltage to the (+) terminal and negative to the (–) terminal. (See Figure 3)
3.Mount the horn to the electrical outlet box using the two mounting
screws supplied.
TABLE 1A.
SOUNDER OUTPUT (dBA) REVERBERANT
8
12
SWITCH
OUTPUT 8
12 16-33 16-33
PATTERN
SETTING
LEVEL VDC VFWR VDC VFWR VDC VFWR
1
TEMPORAL HIGH
68
67
71
70
78
76
LOW
66
65
69
68
76
75
3
NONHIGH
TEMPORAL
72
71
75
74
80
79
4
NONTEMPORAL
70
69
73
72
78
77
2
TEMPORAL
LOW
FIGURE 3.
FROM
CONTROL
PANEL OR
PREVIOUS
DEVICE
TO EOL
OR
NEXT
DEVICE
TABLE 1B.
SOUNDER CURRENT DRAW (mA RMS)
8-17.5 VOLTS
16-33 VOLTS
SWITCH
POSITION
SOUND
PATTERN
VOLUME
DC
FWR
DC
FWR
1
TEMPORAL
HIGH
12
10
17
15
2
TEMPORAL
LOW
10
9
14
13
3
NONTEMPORAL
HIGH
22
17
29
25
4
NONTEMPORAL
LOW
17
13
21
19
NOTE: SHOWN WITH CONTROL PANEL IN ALARM. PANEL POLARITY
REVERSED IN SUPERVISORY CONDITION.
A0358-00
Please refer to insert for the Limitations of Fire Alarm Systems
THE LIMITATIONS OF HORNS
WARNING
The horn will not work without power. The horn gets its power from the fire/security
panel monitoring the alarm system. If power is cut off for any reason, the horn will not
provide the desired audio or visual warning.
The horn may not be heard. The loudness of the horn meets (or exceeds) current
Underwriters Laboratories’ standards. However, the horn may not alert a sound sleeper or
one who has recently used drugs or has been drinking alcoholic beverages. The horn may
not be heard if it is placed on a different floor from the person in hazard or if placed too
far away to be heard over the ambient noise such as traffic, air conditioners, machinery
or music appliances that may prevent alert persons from hearing the alarm. The horn
may not be heard by persons who are hearing impaired.
THREE-YEAR LIMITED WARRANTY
System Sensor warrants its enclosed product to be free from defects in materials and
workmanship under normal use and service for a period of three years from date of
manufacture. System Sensor makes no other express warranty for this product. No
agent, representative, dealer, or employee of the Company has the authority to increase
or alter the obligations or limitations of this Warranty. The Company’s obligation of this
Warranty shall be limited to the replacement of any part of the product which is found
to be defective in materials or workmanship under normal use and service during the
three year period commencing with the date of manufacture. After phoning System
Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization number,
send defective units postage prepaid to: Honeywell, 12220 Rojas Drive, Suite 700, El Paso
TX 79936, USA. Please include a note describing the malfunction and suspected cause
of failure. The Company shall not be obligated to replace units which are found to be
defective because of damage, unreasonable use, modifications, or alterations occurring
after the date of manufacture. In no case shall the Company be liable for any consequential or incidental damages for breach of this or any other Warranty, expressed or implied
whatsoever, even if the loss or damage is caused by the Company’s negligence or fault.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you
specific legal rights, and you may also have other rights which vary from state to state.
FCC STATEMENT
SpectrAlert Strobes and Horn/Strobes have been tested and found to comply with the
can radiate radio frequency energy and, if not installed and used in accordance with the
limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
instruction manual, may cause harmful interference to radio communications. Operation
designed to provide reasonable protection against harmful interference when the equipof this equipment in a residential area is likely to cause harmful interference in which
ment is operated in a commercial environment. This equipment generates, uses, and
case the user will be required to correct the interference at his own expense.
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©2016 System Sensor. 06-10